from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A flagellated male gamete produced by an antheridium, found in certain algae, seedless plants, and gymnosperms.
  • noun A spermatozoon.

from The Century Dictionary.

  • noun See spermatozooid.

from the GNU version of the Collaborative International Dictionary of English.

  • noun (Biol.) The male germ cell in animals and plants, the essential element in fertilization; a microscopic animalcule-like particle, usually provided with one or more cilia by which it is capable of active motion. In animals, the familiar type is that of a small, more or less ovoid head, with a delicate threadlike cilium, or tail. Called also spermatozoön. In plants the more usual term is antherozoid.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun biology A motile, ciliated male gamete produced in the antheridium of an alga, fern or gymnosperm

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun a motile male gamete of a plant such as an alga or fern or gymnosperm


from The American Heritage® Dictionary of the English Language, 4th Edition

[spermatozo(on) + –id.]



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